. Seventh annual bird-house booklet. . broods are reared during thesummer RANGE— Mexico and the West Indies to Venezuela and Brazil and rarely straggling species does not breed anywhere within the limits of its winter range, except possiblyin southern Mexico where its summer range overlaps its winter range. The colonies ofMartins breeding in the U. S. and Canada may go far into the South America to winter,but they will return to their northern haunts each In all the region within the boundaries described, these birds wander from their chosenbreedi
. Seventh annual bird-house booklet. . broods are reared during thesummer RANGE— Mexico and the West Indies to Venezuela and Brazil and rarely straggling species does not breed anywhere within the limits of its winter range, except possiblyin southern Mexico where its summer range overlaps its winter range. The colonies ofMartins breeding in the U. S. and Canada may go far into the South America to winter,but they will return to their northern haunts each In all the region within the boundaries described, these birds wander from their chosenbreeding grounds to and from their winter retreats under thetropical sun. During this semi-annual migration, individuals maybe attracted to suitable boxes put up for their use in sections ofthe country where they are not now encouraged. FOOD- Living entirely upon winged insects, almost all of which arevery obnoxious to the agriculturalist, a colony of Martins can as-sist him far more than human hands in curbing (he inroads ofthese howing At my own premises where my colonies of breeding Martins 1902 have numbered over eighty pairs, the four houses are mantained Thousands of Jacobs Martin Houses are now in use in the states east of the Rocky Mountains, in Canada and in Europe. SiFl# ® 4® R®#iits
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